JP3490637B2 - Material wrap roll, method of manufacturing the material wrap roll, and apparatus for performing the method - Google Patents

Abstract

The plastic strip(16) is a coated film whose adhesive coated surface(16a) forms the outer roll surface facing the material. Independent claims are made for:- (1) a method for producing the material roller in which a core(11) is formed by wrapping the adhesive coated film strip(16) with adhesive facing outwards around a cylindrical mandrel, bonding the overlapping film areas to attach them to the mandrel, attaching the start(18) of a material(12) to be wound onto the core surface(16a), and rotating the mandrel to wind on the band material before removing from the mandrel; (2) process equipment including an expanding mandrel with radially adjustable segments which can be reduced in diameter after producing the wound material. Preferred Features: The core is made from film of the same material as the material to be wound on, and has a thickness of 20-40 microns. Conventially available self adhesive film may be used. The nature of the adhesive coating allows removal of the adhering material without transfer of adhesive particles to the latter. An adhesive coated plastic film forms a sleeve surrounding the wound material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a core sleeve formed by joining both edge portions of a flexible plastic strip to each other so as to overlap each other, and the surface of a material wound around the core sleeve in the core sleeve. A wrapping material wrap roll, the outer surface of which is formed to counter the sliding of the material on this surface, in particular for winding material for tying the packaging.

In particular, the present invention, also referred to as a "tape reel", generally relates to a material wrap roll for winding and supporting a flat cross-sectioning thermoplastic tape for bundling wound around a core sleeve in a snare shape on a hollow core. Is.

[0003]

Material wrap rolls for winding cord-shaped, ribbon-shaped or tape-shaped strip materials such as woven fiber materials, monofilaments usually have a dimensionally stable core sleeve and, in some cases, are wound. It has a band seal or a sleeve seal that wraps the material so as to be wound from the outside.

In conventional tape reels, the core sleeve consists of a relatively thick paper tube so as to ensure high stability, especially against radial forces exerted by the wound material. The end of the material wrapped around it on the core sleeve side is usually attached to the edge of the core sleeve or its surface by means of adhesive tape.

Cardboard core sleeves have the advantage of being relatively inexpensive. However, on the other hand, it is relatively heavy and quite bulky, so it has the drawback of being somewhat troublesome to transport and store. Furthermore, when disposal of such core sleeves is a problem, there is a considerable disposal penalty, as it is usually wrapped around with the rest of the material that is no longer available on the processing machine. Therefore, for pure fractional recycling, it is necessary to remove the rest of the material from the cardboard sleeve and dispose of both materials separately.

Thermoplastic tapes for bundling are usually polypropylene (PP) or polyethylene (P
E), both of which are plastics that can be disposed of without problems. Concerning disposal issues consistently DE 93 15
668 U1 provides a plastic, especially PP strip as a core sleeve (referred to as "inner sleeve" in the patent) for winding material. The thickness of this plastic sheet is preferentially 0.5 to 1 mm, especially about 0.7 mm. The inner sleeve consists of a strong, flexible strip of the above-mentioned plastic with a specially shaped end, the tongue-shaped end of which is inserted into the slit-shaped opening formed in the other end, so that The both ends fastened to each other serve as both ends of the cylindrical inner sleeve so that they can closely contact each other so as not to move.

[0007]

Forming such an inner sleeve from a strong, flexible plastic strip requires machining, especially with respect to the shape of the end of the strip. Further, skill is required in forming the sleeve from the plastic strip. It is easier to carry and store the inner sleeve as it is in the raw material of the plastic strip compared to the case where it is in the form of a finished product,
Even so, its special storage and pre-processing requires considerable effort. Therefore, starting from the above state of the art, the present invention aims to provide a material wrap roll which is clearly simplified compared to the inner sleeve.

[0008]

This object is solved according to the invention by a material wrap roll according to claim 1. That is, the material wrap roll according to the invention is characterized in that the plastic strip consists of an adhesive-coated foil, the adhesive-coated surface forming the outer surface of the core sleeve facing the material.

Of primary importance to the present invention, this is that the core sleeve must be formed into a very rigid tube such as a cardboard sleeve, or DE 93 15
This is a departure from the conventional idea that a strong and flexible object, such as the inner sleeve described in 668U1, must be used. The present invention, rather, allows the wrapped material to impart high stability even to the entire material wrap roll, especially when the first wound portion of the material wrapped around the core sleeve is firmly attached to the core sleeve. It is based on the recognition that it can be granted. With this recognition, surprisingly, the core sleeve according to the invention need only be formed from an adhesive-coated foil of a thermoplastic such as polypropylene (PP) or polyethylene (PE),
The foil forming such a core sleeve is only about 20-30
A thickness of μm is sufficient. Thus, it is easy to use the same plastic for the foil as that used for the material wrapped around it, which absolutely guarantees pure fractional disposal. Alternatively, a commercially available pressure sensitive adhesive film can be used as the foil forming the core sleeve. This may be, for example, the type pressure sensitive adhesive film used in packaging wraps. Accordingly, the present invention is particularly advantageous in that the method of manufacturing the core sleeve is exceptionally simple.

In addition, the present invention is generally based on the fact that when the material used is a tape-like material made of the usual thermoplastics for tying machines, the surface of the tape itself is formed into a specific shape for reasons of stability. Utilize characteristics. The surfaces of the individual windings of material wound on the tape reel are then in close contact with each other, so that the finished winding does not unravel when transported and moved horizontally. Further, the present invention provides a plastic foil having an adhesive coating on the side facing the material as a cylinder tightly enclosing the outer side of the wound material, and apart from this, the adhesive coating is applied. Further stability is provided by the presence of open or neutralized opening tabs.

Furthermore, the present invention relates to a method for producing a material wrap roll of the above-mentioned type, in which (a) an adhesive-coated strip-shaped foil is used as an adhesive coated surface for producing a core sleeve of the material wrap roll. A step of winding the supporting mandrel in a substantially cylindrical shape with the opposite surface facing outside, and a step of (b) fixing the strip-shaped foil to the supporting mandrel by pasting overlapping portions (overlap portions), and (c) winding Applying the beginning of the material to the adhesive coated outer surface of the core sleeve, and (d) rotating the support mandrel about its longitudinal axis and continuing until the desired amount of material has been wrapped around the material wrap roll. And (e) removing the material wrap roll from the support mandrel.

Here, further, (f) the step of covering the outside of the material wrap roll with a pressure-sensitive adhesive type plastic sheet as a tube seal may be included. In particular, this step can be carried out before or subsequent to the step (e).

Finally, the invention further comprises, in an apparatus for carrying out the method described above, as a supporting mandrel, an extendable mandrel comprising segments which are radially positionable with respect to their axis of rotation, which comprises: A gist of the device is characterized in that after the material wrap roll is completed, the material wrap roll is retracted while being reduced in diameter so that the material wrap roll can be released from the telescopic mandrel.

To wrap the material around the core sleeve, this very simple telescoping mandrel is all that is needed. When unwinding material from the material wrap roll, i.e. to support the material wrap roll while consuming the material,
We do not anticipate any further special measures. Of course, as is conventional, it is also possible to use a conventional take-up mandrel or support roller which covers the material on top of the paper sleeve as the core sleeve.

[0015]

DETAILED DESCRIPTION OF THE INVENTION In FIG. 1, a completed material wrap roll is designated by the reference numeral 10. It comprises a core sleeve 11, a material 12 wrapped around it, a plastic sheet 13 which encloses the outside of the wrapped material 12 in a tubular seal, and an opening tab 14 at the tip.

The core sleeve 11 is made of a film-shaped plastic strip wound in a cylindrical shape with an adhesive coating on the outer surface 11a. The outer plastic sheet 13 has an adhesive 13 applied to its inner side 13a. The opening tab 14 has no adhesive coating on the lower surface 14a facing the wrap roll, or the applied adhesive coating is neutralized. When neutralized, it is, for example, the ends of the plastic sheet 13 laminated in two layers so that the plastic surfaces are laminated together, so that the opening tab 14 is formed. With reference to the highly schematic FIG. 1, within the portion 15 where the opening tab 14 begins, the overlapping portion of the plastic strip 13 in the form of a pressure sensitive adhesive film ensures that it at least surrounds the entire outer surface of the wrapped material 12. Is preferably present.

The high stability of the material wrap roll 10 shown in FIG. 1 results from the initial wrap of the material 12 wrapped around the core sleeve being firmly attached to the core sleeve. Higher stability is obtained by tightly sealing the rolled material 12 with a plastic strip 13. With such a winding method, for example, it is wound on a cylindrical surface, and even if it is transported while being vibrated in some cases, it is stable to the extent that it is hardly subjected to disadvantageous deformation.

FIG. 2 schematically shows a thin plastic foil 16 having an adhesive applied to the outer surface 16a and wound around the core sleeve 11. The overlapping ends are not shown in FIG. 2, but are shown in FIG. 3 below. In the figure, the overlapping portion is represented by 17.

As can be seen from FIG. 2, the first winding section 18 of the material 12, here a plastic tape of flat cross section, is applied directly to the adhesive surface 16a. In this example, the unwinding starts from the center of the core sleeve and goes to the left according to FIG. 2, whereas the next winding goes to the right end of the core sleeve, the so-called crossing, Based on the adhesive surface 16a, the front half of the first winding and the rear half of the second winding form a layer of material in contact with the adhesive layer. In this way a material wrap roll is formed, i.e. pulled in with a relatively slight tensile force or winding tension, so that the wound material itself does not undergo unacceptable deformation.

In order to wind the plastic foil 16 which is unstable to the inner sleeve 11, as shown in FIG. 3, an expandable mandrel 19 having four segments 20 which can be adjusted in a substantially radial direction is used in this embodiment. When the segment is in the open position represented by the solid line and arrow, the pressure sensitive adhesive film 16 is wrapped with the plastic foil side 16a thereof facing outward and wrapped around the outer surface of the generally cylindrical open segment. In the overlapping portion 17, the ends that are in contact with each other are pasted together.

The winding process described with reference to FIG. 2 can now be started, after which the segment 20 is retracted towards the center of the telescoping mandrel 19 so that the finished material wrap roll, ie, The finished material wrap roll, which is surrounded by the outer envelope 13 described with reference to FIG. 1, can be easily taken out from the winding device while being covered with the expansion mandrel or afterwards.

[Brief description of drawings]

FIG. 1 is a perspective view of a completed material wrap roll.

FIG. 2 is a view showing a state in which a material is started to be wound around a core sleeve of a material wrap roll.

FIG. 3 is a schematic front view of a retractable mandrel covered with a core sleeve.

[Explanation of symbols]

10 ... Material wrap roll 11 ... Core sleeve 12 ... Bundling material 14 ... Tab for opening 16 ... Flexible plastic strip 18 ... Both ends of flexible plastic strip

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-10-7328 (JP, A) JP-A-4-106175 (JP, A) JP-A-8-208125 (JP, A) JP-A-60- 76583 (JP, A) Actual development 2-86976 (JP, U) Actual development 49-131480 (JP, U) Actual development 54-107773 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65H 75/10 B65H 75/50

Claims (12)

(57) [Claims] 1. A core sleeve (11) is formed by joining both ends (17) of a flexible plastic strip (16) to each other so as to overlap each other, and at the core sleeve (11), the core sleeve is attached to the core sleeve. The outer surface facing the material (12) to be wrapped is the material (1
2) A binding material wrap roll formed to counter the slip of 2), in particular for winding a material (12) for binding a package, wherein the plastic strip (16) comprises a foil with an adhesive. , The surface (16a) provided with the adhesive is the material (1
The material wrap roll, characterized in that it forms the outer surface of the core sleeve (11) facing 2). 2. The foil (16) of the core sleeve (11)
The material wrap roll according to claim 1, wherein is made of a thermoplastic such as polypropylene (PP) or polyethylene (PE). 3. The foil (16) of the core sleeve (11)
The material wrap roll according to claim 1 or 2, wherein the material wrap roll is made of the same material as the material wound around the material. 4. The foil (16) of the core sleeve (11)
Material wrap roll according to any one of claims 1 to 3, characterized in that it has a thickness of about 20 to 40 m. 5. Material wrap roll according to any one of claims 1 to 4, characterized in that the core sleeve (11) is made from a commercially available pressure-sensitive adhesive film such as a package wrap. 6. The core sleeve (11) is formed using a commercially available pressure sensitive adhesive film, but using polypropylene (PP) as the material for the plastic foil (16). Claims 1 to 5
The material wrap roll according to any one of 1. 7. The material (12) which adheres to the plastic layer (16a) can be peeled off again from the plastic layer without the particles of the adhesive being brought together. The material wrap roll according to any one of 1. 8. A plastic sheet (13) provided with an adhesive on the side facing the material (12), which closely encloses the outside of the wound material (12) as a cylinder seal. The material wrap roll according to any one of claims 1 to 7. 9. The envelope is provided with an opening tab (14) spaced apart therefrom which is either uncoated or neutralized with an adhesive coating.
The material wrap roll described in 1. 10. A method of manufacturing a material wrap roll using the core sleeve (11) according to any one of claims 1 to 9, comprising: (a) a core sleeve (1) of the material wrap roll (10).
To make 1), a foil strip (16) with an adhesive is wound around a substantially cylindrical support mandrel (19) with the side opposite the adhesive-coated side (16a) facing outwards, (b) The strip-shaped foil (16) is fixed to the supporting mandrel (19) by bonding the overlapping portion (overlap portion (17)), and (c) the starting end (18) of the material (12) to be wound is attached to the core sleeve (11). ) Adhesive coated outer surface (16a), and (d) rotating the support mandrel (19) about its longitudinal axis until the desired amount of material is wrapped around the material wrap roll (10). And (e) taking out the material wrap roll from the supporting mandrel (19). 11. The (f) material wrap roll (1)
On the outside of (0), pressure-sensitive adhesive plastic sheet (1
It is also possible to include the step of fitting 3) as a cylinder seal, which step is performed before the step (e) according to claim 10.
The method according to claim 10, which can be performed after the step. 12. An apparatus for carrying out the method according to claim 10 or 11, characterized in that a telescoping mandrel is provided with a segment (20) as a supporting mandrel which is positionally adjustable in the radial direction with respect to its own axis of rotation. 19), which is retracted with a reduced diameter after the material wrap roll (10) is completed, whereby the material wrap roll (1)
0) is released from the telescoping mandrel (19).